Carrier PDD3 Owner's Manual page 10

Before you call for service...
...check for several easily- -solved problems.
If insufficient heating or cooling is suspected:
( ) Check for sufficient airflow. Check the air filter for dirt. Check
for blocked return- -air or supply- -air grilles. Be sure they are open
and unobstructed. If these checks do not reveal the cause, call your
servicing dealer.
If your unit is not operating at all, check the following list for
easy solutions:
( ) Check to be sure that your thermostat temperature selector is
set below the indoor temperature during the cooling season or
above the indoor temperature during heating season. Be sure the
10
SYSTEM switch or MODE control is in the COOL or HEAT and
not OFF.
( ) If your unit still fails to operate, call your servicing dealer for
troubleshooting and repairs. Specify the model and serial numbers
of your unit. (Record them in this manual in the space provided.) If
the dealer knows exactly which unit you have, he may be able to
offer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
In Case of Trouble
If you perform the steps above and unit performance is still
unsatisfactory, shut off the unit and call your dealer.
BURNER FLAME
Fig. 10 - - Monoport Burner
Copyright 2016 International Comfort Products
Lewisburg, TN 37091 USA
Specifications are subject to change without notice.
BURNER
MANIFOLD
Replaces: 51802230300
C99021
51802230301